Carbureter.



W. P. PEMBROKE.

CARBURETER.

APPLICATION HLED MAR; 16, I914.

1 1 92,1 06, Patented July 25, 1916.

wmrmfi) r. PEMBROKE, or eschews, YORK.

amer To l w m'i imm n nt: f1 a Be zit known that I, lymrlnrin li Pmye BROKE, of Rochester, in the countyofjMon-q 1'06 and St e f New ork, ha eai lv n ed" certain new and useful Improvements in Carburetersf; and Ido hereby declare the following to bea full, clear, and exact de scription of the same, reference being had to the accompanying drawings, forming apart of this specification, and to the reference numerals marked thereon. y,

My present invention has -for its object to provide anarrangement of parts adaptedto a device of this nature comprising the holbe incorporated in the construction of car; bureters such as those used forfsupplying the explosive mixture for explosive meters or engines, and it has for its primary object to provide an arrangement of inlets, or pas: sages, for the liquid fuel and air in con: junction with a deflecting surface whereby the stream of liquid fuel is thinned out, or attenuated. and caused to form acarbureted mixture with the inrushing air by reasonof thecontact of both of said elements with said surface. I a I,

My invention has forjits further object to provide a valve mechanism by means of which the flow of air and liquid fuel may automatically be controlled and propor: tioned by the pressure of the inrushing air admitted to the carbureter. H N i.

To these and otherends theinvention consists in certain improvements and combinations of parts all'aswill be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

Inlthe drawings: Figure 1 is a crosssectional view of a carburetor casing illustrating mechanism constructed in accordance with myinvention applied thereto; Fig.'2 is an enlarged detail sectional view showing a valve head in the open position; Fig. 3 is a'similar view of the valve head illustrating the use of weights for restraining its opening 1 move-' ment, and Fig. 4 is a detail sectionalview of a modification illustrating the deflecting surface arranged stationary relatively to the air and fuel inlets. I c 3 Similar reference numerals in the several figures indicate the same parts. f

My invention comprehends an arrange ment of parts applicable to acarbureter of the usual or any preferred construction, and

for the purposes of illustrationI have shown sp'eeifi'cau'o'ii of Letters rarest.

Patented July 25,- 1916,

, Application iile drMarch 16, 1914. Serial 110.

low casing forming the vaporizing chamber 2 from which the outflowof carbureter mlx ture is controlledby a throttle valve 3.', The

usual air inlet valve is shown comprising the head 4, cooperating w th the seat, ,5 and car ried on the stem 6, surrounded by the coil spring 7 which serves to normally hold the valve head l in the. closed position, said spring beingadjustable so that the valve head may automaticallyopenwhen thedesired partial vacuum is produced in the H chamber 2.

I In illustrating my invention I have shown a combined air and, liquid fuel nozzle opening into the bottom of the chamber 2 com: prising a head S on the tube 9, which latter, it-willbe understood, isconnected with the fioat chamber 10. 3 The head 8 comprises a circumferential air inlet passage A within which is disposed the liquid fuel inlet B,

the outercopenend of which is preferably taperedslightly, as shown, to form aseat 1n which is fitted a conical projection, or valve member I), carried on the lower side of a disk 10?. which may be utilized as a valve head and mounted to cooperatewith the flattened face, or seat provided on the nozzle or head 8. lhe disk 10 iscarried upon a rod 11 guided in a threaded sleeve 12, vertically adjustable in the top of a casing 1 for the purpose of regulating the tension of the coil spring; 13(which surrounds the stem 11 and serves to normally hold the valve head 10 in the'closed position, as shown in Fig. 1. i In lieuofthe spring 13, weights in the form of washers indicated by 12* and illustrated in Fig. 3, rnay be used as it is merely desired to provide ajdjustable means for retarding the movement of the valve head 1O by offeringa givenpredeterminedresistance to its opening movement, which will only be overin the chamber 2 and the external arms,

phere is sufficient to overcome the resist ance of the spring 13, the aircurrents seeking to enter the chamber 2 through the air inlet A will cause the valve head 10 to be opened to a greater or less extent, as

shown in Fig. 2. These inrushing air currents are in the form of a tubular column, the top of which engages against the under surface of the disk 10 and is deflected laterally and annularly and so long as the I pressure 13 constant the air currents support obliged to pass through or cross over the column of inrushing air, the twofold purpose of which is to cause the liquid fuel to be attenuated while it is still in its liquid state, by contact with the, deflecting surface and to be thoroughly mixed with the air currents by contact with the latter at the point where said air currents engaged the deflecting surface andfrom which point the air and fuel in vaporized condition-pass off together as the 'carbureted mixture. The proportion of the fuel admitted in relation to the quantity ofair flowing through the inlet A is controlled by the valve head projection b which is preferably made conical to provide not only for easy and delicate contact of the fuel, but also to serve as a means for dividing the fluid column emitted from the nozzle B and direct it laterally in all directions. By observation of the illustration shown in Fig. 2 it will be seen that theflcolumn of gasolene or other hydro- 1 carbon fluid is divided by the point of the projection b and traveling upward engages against the deflecting surface of the valve head 10, which causes it to be splayed into a mushroom shape, or canopy, at the edge of the deflecting surface where the fuel sheet becomes thin the inrushing air column impinges against it producing the further effect of attenuating said liquid sheet and immediately creating it into afivapor which is directed laterally, in the presence of the moving air currents and away from the ana nular edge of the deflecting surface.

In Fig. {l I- have shown a modification of the parts previously described, illustrating the deflecting surface as beingin the form of a stationary projection 100 extending over an air inlet passage A andfue'l inlet passage B the former being arranged as a semi-circular opening inclosing the outlet B. so that the fuel ejected therefrom in Copies of this patent may be obtained for order to escape from beneaththe flange 100 is obliged to cross between said flange and air jet rushing inwardly through the aperture A.

i A fuel vaporizing mechanism comprising my invention is automatic 1n its operation,

as'it is controlled entirely by the air pressure seeking'admittance into the carbureter casing and the supply of liquid fuel and air are always proportioned to each other and the quantity' of each of these elements de livered is at all times of the exact amount demanded by the engine,*.or 'motor, with which theqcarbureter is associated. F urthermore, the mechanism consists of few parts which ares'imple in their arrangement and are adapted to be applied to-the vaporizing chamber of carbureters of the usual, as well as any preferred, construction.

I'claim as my invention Y 1. In a carbureter, the combination with I a casing in which a partial vacuum is maintained, of a head insertible through a Wall of the casing and having a' reduced tubular extensionpositioned exteriorly of the casing forming a fuel inlet communicating with said casing, said head having air inlets formed therethrough communicating with the casing and terminating outwardly sub-.

stantially at'a point where the tubular extension connects with said head, and a valve normally closing the inlets and adapted to be opened by air currents passing through said air inlets and serving, when opened, to

deflect the liquid current into the path of the air currents.

2. In a carbureter, the combination with a casing in which a partial vacuum is maintained, of a head inserted in the wall of the casing having a plurality of air inlets therein and provided witha centrally disposed fuel inlet and a valve normally closing the fuel and air inlets and adapted to 'be'opened' by air currents passing through the air inlets. r

3. In a carbureter, the combination with a casing in which a partial vacuum is maintained, of a head inserted in the wall of the casing having a pluralityof air inletstherein and provided with a centrally disposed inwardly tapering fuel inlet and a valve normally closing the air inlets and adapted to be opened by air currents entering the latter and having a pin projecting into the fuel inlet.

v I WINFIELD Witnesses:

RUSSELL B. GRIFFITH, M. MADELINE MILLER.

P. rEMBRoKE,

five cents each, byaddressing the Commissioner of Patents,

washing'ton, D; G. j 

